如何在片段类中显示listView？

Question

I'm new in android programming. I want to try to make simple tab layout app using fragment , how to display listView in a fragment? , I have googled and found a solution but it not using fragment class. I can show webview but how to show a listVIew

My tab1 class:

       public class Tab1 extends Fragment {
WebView webView;
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        // get the url to open
        // set up the WebView
        webView = (WebView) getView().findViewById(R.id.webView);
        webView.setWebViewClient(new MyBrowser());
        webView.getSettings().setLoadsImagesAutomatically(true);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        webView.loadUrl("http://www.google.com");
    }
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v =inflater.inflate(R.layout.tab_1,container,false);
        return v;
    }
    private class MyBrowser extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }
}

My tab2 class ( i want to display listView here):

    public class Tab2 extends Fragment {
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

The// ListView activity needs to extend activity class, it doesn't work in a fragment, how to display in a fragment?
    }
    
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.tab_2, container, false);
        return v;
    }

}

Fragment adapter:

public class ViewPagerAdapter extends FragmentStatePagerAdapter {

 CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created // Build a Constructor and assign the passed Values to appropriate values in the class public ViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) { super(fm); this.Titles = mTitles; this.NumbOfTabs = mNumbOfTabsumb; } //This method return the fragment for the every position in the View Pager @Override public Fragment getItem(int position) { if(position == 0) // if the position is 0 we are returning the First tab { Tab1 tab1 = new Tab1(); return tab1; } else //if (position == 1) // As we are having 2 tabs if the position is now 0 it must be 1 so we are returning second tab { Tab2 tab2 = new Tab2(); return tab2; } // else // { // NewKasus newKasus = new NewKasus(); // return newKasus; // } } // This method return the titles for the Tabs in the Tab Strip @Override public CharSequence getPageTitle(int position) { return Titles[position]; } // This method return the Number of tabs for the tabs Strip @Override public int getCount() { return NumbOfTabs; } }

My MainActivity:

public class MainActivity extends ActionBarActivity {
//


    // Declaring Your View and Variables

    Toolbar toolbar;
    ViewPager pager;
    ViewPagerAdapter adapter;
    SlidingTabLayout tabs;
    CharSequence Titles[]={"Berita","Kasus","Add Kasus"};
    int Numboftabs =3;


    //
   // bawaaan materal tab
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        // Creating The Toolbar and setting it as the Toolbar for the activity

        toolbar = (Toolbar) findViewById(R.id.tool_bar);
        setSupportActionBar(toolbar);


        // Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
        adapter =  new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);

        // Assigning ViewPager View and setting the adapter
        pager = (ViewPager) findViewById(R.id.pager);
        pager.setAdapter(adapter);

        // Assiging the Sliding Tab Layout View
        tabs = (SlidingTabLayout) findViewById(R.id.tabs);
        tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width

        // Setting Custom Color for the Scroll bar indicator of the Tab View
        tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
            @Override
            public int getIndicatorColor(int position) {
                return getResources().getColor(R.color.tabsScrollColor);
            }
        });

        // Setting the ViewPager For the SlidingTabsLayout
        tabs.setViewPager(pager);



    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1

Here i am giving you simple example of showing list In Fragment.

your fragment first...

public class Tab1 extends ListFragment { 
String[] list_items;    

Tab1(){
}

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView =inflater.inflate(R.layout.tab_1,container,false);
    list_items= getResources().getStringArray(R.array.list);
    setListAdapter(new ArrayAdapter(getActivity(),android.R.layout.simple_list_item_1,list_items);

 return rootView;
}
}

in your strings.xml

 <string-array name="list">
         <item>item1</item>
         <item>item1</item>
         <item>item1</item>
         <item>item1</item>
         <item>item1</item>
  </string-array>

your tab_1 layout have to have.. listView. with id android:list this is only necessary when you extend your fragment with ListFragment class. If you simply extend with Fragment then you won't need to add this specific id android:list .

for this example i am giving you need following in your layout...

<ListView android:id="@id/android:list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#00FF00"
    android:layout_weight="1"
    />

this is all you need to create listView in fragment.

In your case, you get the data in array and then pass it in listView. Here in example i used locally. Hope it helps!

Answer 2

What is the source of your data? If you are using ordinary Strings, you could just do it in your onCreateView method, the same way you'd do it in an Activity.

If you are getting the data from a database or network, you'd be better off doing it in the onPostExecute method of an AsyncTask